I'm flying the 727 too, and the 707 is quite similar. There are some differences though, like the hydraulics (because the elevators and ailerons on the 707 were cable-operated). But the fuel-system and the electrics are very similar, you just have one "unit" more per system.

So, if you're a 727 pilot, you sure can fly the 707! Just make yourself clear, that the 707 needs much more runway than the 727 does, and you'll be fine! 

You're welcome!

You got a VA with classic metal? Cool!  Whats the name of your airline?

haha yeah

i do the same thing with otto etc, i've added fspassenger X to it to give it a bit more touch during flights giving food and making the passengers happy

for Finn:
I made an unofficial Air Holland virtual airline. They are bankrupt for a long while now and since i liked the old livery and they actually flew with the 727-200 aircrafts i brought up the idea to create a VA for myself for it nothing fancy, just to keep something registered on flighthours etc , There is no livery available for it, so i dug up my pencils and created my own livery pretty close to the original and i think it really matches up with the original one, despite my lack of knowledge of photoshop painting  

I also have the 757/767 from captainsim but i got lost in how to fly with the FMC even though i tried following some guides. In the end, its not a thing for me.. so i kept flying with the 727 which i enjoy very much, but i do want something bigger and since the captainsim has great products i'm thinking of adding the 707 to the fleet although air holland never flew with it.. but hey, its virtual and its a game

well, if not bothered, you can join mine if you want and fly the lovely ladies

can give you all freedom you like (and no need to pay)